Heck at your age, of course you have no objection.
Sorry, bad joke.
It's ok for you to have no objection to it. But I agree with Marie, if someone else finds it objectionable they need support.
I've had many comments of a sexual nature, or especially comments about my amble butt, and since I haven't nipped it in the bud, asked them to stop, or complained to higher ups, it's my own fault for allowing it. I take it in stride and realize it is mostly just harmless talk and don't feel degraded.
Female on male comments of this nature are more common than females would like to admit. Males of course don't complain. However, this shouldn't give males permission to make lewd comments to females either.
Finally, I'm not sure I can buy into the idea that we are just high schoolers at heart. My hormones are firmly under control, thank you very much.